/* === CSS Variables === */
:root {
    --bg: #f1f5f9;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --heading: #0f172a;
    --border: #e2e8f0;
    --input-border: #cbd5e1;
    --input-bg: #ffffff;
    --table-header-bg: #f8fafc;
    --table-border: #f1f5f9;
    --hover-bg: #f8fafc;
    --navbar-bg: #1e293b;
    --admin-navbar-bg: #0f172a;
    --card-shadow: 0 1px 3px rgba(0,0,0,.06), 0 4px 16px rgba(0,0,0,.04);
    --card-shadow-hover: 0 4px 12px rgba(0,0,0,.1), 0 8px 24px rgba(0,0,0,.06);
    --link: #3b82f6;
    --link-hover: #2563eb;
    --focus-ring: rgba(59,130,246,0.25);
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --success: #10b981;
    --danger: #ef4444;
    --danger-dark: #dc2626;
    --warning: #f59e0b;
    --radius: 10px;
    --radius-sm: 6px;
    --radius-lg: 14px;
}

/* === Reset & Base === */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); text-decoration: underline; }

/* === Container === */
.container { max-width: 980px; margin: 0 auto; padding: 24px 20px; }

/* === Navbar === */
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--navbar-bg);
    color: #fff;
    padding: 0 24px;
    height: 56px;
    border-bottom: 3px solid var(--primary);
}
.nav-title { font-size: 1.05rem; font-weight: 700; letter-spacing: -0.3px; }
.nav-right { display: flex; align-items: center; gap: 16px; }
.nav-profile { color: #cbd5e1; font-weight: 500; cursor: pointer; font-size: 0.9rem; }
.nav-profile:hover, .nav-profile.active { color: #fff; text-decoration: none; }
.nav-link { color: #94a3b8; font-size: 0.9rem; }
.nav-link:hover { color: #fff; text-decoration: none; }
.nav-links { display: flex; gap: 4px; }
.nav-links a {
    color: #94a3b8;
    font-size: 0.9rem;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    transition: color 0.15s, background 0.15s;
}
.nav-links a:hover { color: #fff; background: rgba(255,255,255,.08); text-decoration: none; }
.admin-navbar { background: var(--admin-navbar-bg); border-bottom-color: #6366f1; }
.nav-logout-form { display: inline; margin: 0; padding: 0; }
.nav-logout-btn {
    background: none;
    border: 1px solid rgba(255,255,255,.2);
    cursor: pointer;
    font: inherit;
    padding: 5px 14px;
    border-radius: var(--radius-sm);
    color: #94a3b8;
    font-size: 0.85rem;
    transition: all 0.15s;
}
.nav-logout-btn:hover { color: #fff; border-color: rgba(255,255,255,.4); background: rgba(255,255,255,.06); }

/* === Auth === */
.auth-container {
    max-width: 420px;
    margin: 64px auto;
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 44px 40px;
    box-shadow: 0 8px 32px rgba(0,0,0,.1), 0 1px 4px rgba(0,0,0,.06);
    border: 1px solid var(--border);
}
.auth-container h1 {
    text-align: center;
    margin-bottom: 6px;
    color: var(--heading);
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.4px;
}
.auth-container h2 {
    text-align: center;
    margin-bottom: 28px;
    color: var(--text-muted);
    font-weight: 400;
    font-size: 0.95rem;
}
.auth-logo {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 12px;
}

/* === Forms === */
.form-group { margin-bottom: 18px; }
.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-secondary);
}
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--input-border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    transition: border-color 0.15s, box-shadow 0.15s;
    background: var(--input-bg);
    color: var(--text);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--focus-ring);
}
.form-group input::placeholder { color: #b0bcc8; }
.form-card {
    background: var(--card-bg);
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border);
}
.form-row { display: flex; gap: 16px; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 150px; }

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 9px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s;
    line-height: 1.4;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 1px 4px rgba(59,130,246,.4);
}
.btn-primary:hover { background: var(--primary-dark); box-shadow: 0 3px 8px rgba(59,130,246,.4); color: #fff; }
.btn-secondary {
    background: #fff;
    color: var(--text-secondary);
    border: 1.5px solid var(--border);
}
.btn-secondary:hover { background: var(--hover-bg); border-color: #cbd5e1; color: var(--text); }
.btn-danger {
    background: var(--danger);
    color: #fff;
    box-shadow: 0 1px 4px rgba(239,68,68,.3);
}
.btn-danger:hover { background: var(--danger-dark); color: #fff; box-shadow: 0 3px 8px rgba(239,68,68,.35); }
.btn-success {
    background: var(--success);
    color: #fff;
    box-shadow: 0 1px 4px rgba(16,185,129,.3);
}
.btn-success:hover { background: #059669; color: #fff; }
.btn-full { width: 100%; }
.btn-lg { padding: 13px 28px; font-size: 1rem; border-radius: var(--radius); }
.btn-sm { padding: 4px 12px; font-size: 0.78rem; border-radius: 5px; }
.btn-sm:hover { transform: none; }

/* === Errors / Alerts === */
.error-message {
    background: #fef2f2;
    color: #b91c1c;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 0.875rem;
    border: 1px solid #fecaca;
}
.error-message-inline { color: var(--danger); font-size: 0.82rem; margin-top: 4px; }
.success-message {
    background: #f0fdf4;
    color: #166534;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin: 16px 0;
    border: 1px solid #bbf7d0;
}
.error-list {
    background: #fef2f2;
    padding: 16px;
    border-radius: var(--radius-sm);
    margin: 16px 0;
    border: 1px solid #fecaca;
}
.error-list ul { margin-left: 20px; color: #b91c1c; font-size: 0.9rem; }
.info-box {
    background: #eff6ff;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    border: 1px solid #bfdbfe;
    color: #1e40af;
}

/* === Tables === */
.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    margin-bottom: 24px;
    border: 1px solid var(--border);
}
.table th {
    background: var(--table-header-bg);
    padding: 11px 16px;
    text-align: left;
    font-weight: 600;
    font-size: 0.78rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-bottom: 1px solid var(--border);
}
.table td {
    padding: 11px 16px;
    border-bottom: 1px solid var(--table-border);
    font-size: 0.9rem;
    vertical-align: middle;
}
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:nth-child(even) { background: #fafbfc; }
.table tbody tr:hover { background: #f0f7ff; }
.row-inactive { opacity: 0.45; }

/* === Choose Variant === */
.choose-section { display: flex; gap: 20px; margin-bottom: 30px; flex-wrap: wrap; }
.choose-card {
    flex: 1;
    min-width: 260px;
    background: var(--card-bg);
    padding: 28px;
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border);
    transition: box-shadow 0.2s;
}
.choose-card:hover { box-shadow: var(--card-shadow-hover); }
.choose-card h3 { margin-bottom: 18px; color: var(--heading); font-size: 1.05rem; }

/* === Results / Stats === */
.results-summary { display: flex; gap: 16px; margin: 20px 0; flex-wrap: wrap; }
.result-card {
    flex: 1;
    min-width: 120px;
    background: var(--card-bg);
    padding: 20px 16px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border);
}
.result-number { font-size: 2.2rem; font-weight: 800; color: var(--primary); letter-spacing: -1px; }
.result-label { font-size: 0.78rem; color: var(--text-muted); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.04em; }
.stats-summary { display: flex; gap: 16px; margin: 20px 0; flex-wrap: wrap; }
.results-actions { display: flex; gap: 12px; margin: 24px 0; flex-wrap: wrap; }

/* === Dots === */
.answer-dots { display: flex; gap: 8px; flex-wrap: wrap; margin: 20px 0; }
.dot {
    width: 36px; height: 36px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.78rem; font-weight: 700; color: #fff;
}
.dot-correct { background: var(--success); }
.dot-wrong { background: var(--danger); }
.dot-pending { background: var(--warning); }
.dot-small { width: 14px; height: 14px; border-radius: 50%; display: inline-block; }
.dot-inline { font-size: 0.85rem; margin-left: 8px; padding: 2px 9px; border-radius: 12px; color: #fff; font-weight: 500; }

/* === Tasks === */
.task-block {
    background: var(--card-bg);
    padding: 24px 28px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border);
    transition: box-shadow 0.2s;
}
.task-block:focus-within { box-shadow: var(--card-shadow-hover); border-color: #bfdbfe; }
.task-block h3 { color: var(--heading); margin-bottom: 14px; font-size: 1rem; font-weight: 600; }
.task-text { margin-bottom: 14px; line-height: 1.75; font-size: 0.95rem; }
.task-text img { max-width: 100%; vertical-align: middle; }
.task-text img.tex { max-width: none; vertical-align: baseline; }
.task-text { overflow-x: auto; }
.task-text table { border-collapse: collapse; margin: 10px auto; max-width: 100%; display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.task-text table th, .task-text table td { border: 1px solid #d1d5db; padding: 7px 14px; text-align: center; white-space: nowrap; }
.task-text table th { background: #f8fafc; font-weight: 600; }
.task-image { margin-bottom: 14px; }
.task-image img { max-width: 100%; border-radius: var(--radius-sm); }

/* Сворачиваемое общее условие */
.shared-context {
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 14px;
}
.shared-context summary {
    cursor: pointer;
    padding: 10px 16px;
    font-weight: 600;
    color: var(--text-secondary);
    user-select: none;
    font-size: 0.875rem;
}
.shared-context summary:hover { background: var(--border); border-radius: var(--radius-sm); }
.shared-context-body { padding: 0 16px 16px; }
.shared-context-body img { max-width: 100%; border-radius: var(--radius-sm); margin: 8px 0; }
.task-correct { border-left: 3px solid var(--success); }
.task-wrong { border-left: 3px solid var(--danger); }
.answer-compare { display: flex; gap: 24px; margin-top: 12px; flex-wrap: wrap; }
.your-answer { color: var(--danger); font-weight: 500; }
.correct-answer { color: var(--success); font-weight: 500; }
.wrong-answer-block {
    background: var(--card-bg);
    padding: 20px 24px;
    border-radius: var(--radius);
    margin-bottom: 12px;
    border-left: 3px solid var(--danger);
    box-shadow: var(--card-shadow);
}

/* === Task Form (admin) === */
.task-form-block {
    background: #fafbfc;
    padding: 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    border: 1px solid var(--border);
}
.task-form-block h3 { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; font-size: 0.95rem; color: var(--heading); }

/* === Finish Section === */
.finish-section { text-align: center; padding: 32px 0 16px; }

/* === Modal === */
.modal-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15,23,42,.55);
    display: flex; align-items: center; justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(2px);
}
.modal {
    background: var(--card-bg);
    padding: 36px 32px;
    border-radius: var(--radius-lg);
    max-width: 500px; width: 90%;
    text-align: center;
    max-height: 90vh; overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,.2);
}
.modal h3 { margin-bottom: 10px; color: var(--heading); font-size: 1.2rem; }
.modal p { margin-bottom: 16px; color: var(--text-secondary); }
.modal-buttons { display: flex; gap: 12px; justify-content: center; }

/* === Chart === */
.chart-container {
    background: var(--card-bg);
    padding: 20px 24px;
    border-radius: var(--radius);
    margin: 20px 0;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border);
}

/* === Badges === */
.badge { padding: 3px 10px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; }
.badge-green { background: #dcfce7; color: #166534; }
.badge-gray { background: #f1f5f9; color: var(--text-muted); }
.badge-blue { background: #dbeafe; color: #1e40af; }

/* === Actions Bar === */
.actions-bar { display: flex; gap: 10px; align-items: center; margin-bottom: 20px; flex-wrap: wrap; }
.filter-form { margin-left: auto; }
.filter-form select {
    padding: 8px 12px;
    border: 1.5px solid var(--input-border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    background: var(--input-bg);
    color: var(--text);
    cursor: pointer;
}
.filter-form select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--focus-ring); }

/* === Headings === */
h1 { color: var(--heading); margin-bottom: 6px; font-size: 1.5rem; font-weight: 700; letter-spacing: -0.4px; }
h2 { color: var(--heading); margin: 28px 0 14px; font-size: 1.15rem; font-weight: 600; }
h3 { color: var(--heading); font-size: 1rem; }
.subtitle { color: var(--text-muted); margin-bottom: 20px; font-size: 0.9rem; }

/* === Page header bar === */
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; flex-wrap: wrap; gap: 12px; }
.page-header h1 { margin-bottom: 0; }

/* === Pagination === */
.pagination { display: flex; gap: 4px; flex-wrap: wrap; justify-content: center; margin: 20px 0; align-items: center; }
.pagination a, .pagination span {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 34px; height: 34px;
    padding: 0 10px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.15s;
}
.pagination a:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination .current { background: var(--primary); color: #fff; border-color: var(--primary); font-weight: 600; }

/* === Notifications (navbar) === */
.notif-wrap { position: relative; display: inline-flex; align-items: center; }
.notif-btn {
    background: none; border: none; cursor: pointer;
    font-size: 1.2rem; padding: 4px 6px; line-height: 1;
    position: relative; color: #94a3b8;
    border-radius: var(--radius-sm);
    transition: color 0.15s, background 0.15s;
}
.notif-btn:hover { color: #fff; background: rgba(255,255,255,.08); }
.notif-badge {
    position: absolute; top: -3px; right: -3px;
    background: var(--danger); color: #fff; border-radius: 50%;
    font-size: 0.6rem; font-weight: 700;
    min-width: 16px; height: 16px;
    display: flex; align-items: center; justify-content: center;
    padding: 0 3px; pointer-events: none;
    border: 2px solid var(--admin-navbar-bg);
}
.notif-dropdown {
    display: none; position: absolute; top: calc(100% + 10px); right: 0;
    width: 320px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 8px 32px rgba(0,0,0,.14);
    z-index: 1000; overflow: hidden;
}
.notif-dropdown.open { display: block; }
.notif-header {
    padding: 11px 16px;
    font-weight: 600; font-size: 0.82rem;
    background: var(--table-header-bg);
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    text-transform: uppercase; letter-spacing: .04em;
}
.notif-item {
    display: block; padding: 11px 16px;
    border-bottom: 1px solid var(--table-border);
    text-decoration: none; color: var(--text);
    font-size: 0.85rem; transition: background .12s;
}
.notif-item:hover { background: #eff6ff; text-decoration: none; }
.notif-item:last-child { border-bottom: none; }
.notif-item-name { font-weight: 600; color: var(--heading); }
.notif-item-meta { color: var(--text-muted); font-size: 0.78rem; margin-top: 2px; }
.notif-empty { padding: 20px 16px; color: var(--text-muted); font-size: 0.875rem; text-align: center; }

/* === Responsive === */
@media (max-width: 768px) {
    .table { font-size: 0.85rem; }
    .table th, .table td { padding: 9px 12px; }
    .results-summary { gap: 10px; }
    .result-card { min-width: 90px; padding: 14px 12px; }
    .result-number { font-size: 1.8rem; }
    .auth-container { margin: 32px auto; padding: 32px 24px; }
}

@media (max-width: 600px) {
    .container { padding: 12px 14px; }
    .choose-section { flex-direction: column; }
    .results-summary { flex-direction: column; }
    .form-row { flex-direction: column; }
    .navbar { flex-wrap: wrap; gap: 8px; padding: 10px 16px; height: auto; }
    .nav-links { gap: 4px; }
    .actions-bar { flex-direction: column; align-items: stretch; }
    .filter-form { margin-left: 0; }
    .table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
    .answer-dots .dot { width: 30px; height: 30px; font-size: 0.7rem; }
    .btn-sm { padding: 4px 8px; font-size: 0.74rem; }
    .task-block { padding: 18px 16px; }
    .notif-dropdown {
        position: fixed;
        top: 52px;
        left: 0;
        right: 0;
        width: 100%;
        max-width: 100%;
        border-radius: 0 0 8px 8px;
    }
}

/* === Login gradient background === */
body.login-body {
    background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 55%, #0891b2 100%);
    min-height: 100vh;
}
body.login-body .auth-container { margin-top: 72px; box-shadow: 0 20px 60px rgba(0,0,0,.25); border-color: rgba(255,255,255,.15); }

/* === Circular progress ring (results page) === */
.progress-ring-wrap {
    position: relative; width: 104px; height: 104px;
    margin: 0 auto 10px;
}
.progress-ring { width: 104px; height: 104px; transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: var(--border); stroke-width: 9; }
.ring-fill {
    fill: none; stroke: var(--primary); stroke-width: 9;
    stroke-linecap: round;
    stroke-dasharray: 264;
    stroke-dashoffset: 264;
    transition: stroke-dashoffset 1.2s cubic-bezier(.4,0,.2,1);
}
.ring-text {
    position: absolute; top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.15rem; font-weight: 800; color: var(--heading); line-height: 1; text-align: center;
}

/* === Grade card accent colors === */
.grade-card-5 { border-top: 3px solid #10b981; }
.grade-card-5 .result-number { color: #059669; }
.grade-card-4 { border-top: 3px solid #3b82f6; }
.grade-card-4 .result-number { color: #2563eb; }
.grade-card-3 { border-top: 3px solid #f59e0b; }
.grade-card-3 .result-number { color: #d97706; }
.grade-card-2 { border-top: 3px solid #ef4444; }
.grade-card-2 .result-number { color: #dc2626; }

/* === Stat cards with icons (admin dashboard) === */
.stat-card { text-align: center; }
.stat-card-icon { font-size: 2rem; margin-bottom: 8px; display: block; line-height: 1; }
.stat-card-blue  { border-top: 3px solid #3b82f6; }
.stat-card-green { border-top: 3px solid #10b981; }
.stat-card-purple{ border-top: 3px solid #8b5cf6; }
.stat-card-orange{ border-top: 3px solid #f59e0b; }
.stat-card-blue  .result-number { color: #2563eb; }
.stat-card-green .result-number { color: #059669; }
.stat-card-purple.result-number { color: #7c3aed; }
.stat-card-orange .result-number { color: #d97706; }

/* === Admin mobile burger menu === */
.burger-btn {
    display: none; background: none; border: none; cursor: pointer;
    padding: 6px 8px; color: #94a3b8; font-size: 1.4rem; line-height: 1;
    border-radius: var(--radius-sm); transition: color .15s, background .15s;
}
.burger-btn:hover { color: #fff; background: rgba(255,255,255,.1); }
@media (max-width: 700px) {
    .burger-btn { display: inline-flex; align-items: center; }
    .admin-navbar { position: relative; flex-wrap: wrap; height: auto; min-height: 56px; }
    .admin-navbar .nav-links {
        display: none; position: absolute; top: 100%; left: 0; right: 0;
        background: var(--admin-navbar-bg);
        border-top: 1px solid rgba(255,255,255,.08);
        border-bottom: 3px solid #6366f1;
        flex-direction: column; padding: 8px 16px 14px;
        z-index: 300; gap: 2px;
    }
    .admin-navbar .nav-links.open { display: flex; }
    .admin-navbar .nav-links a { padding: 10px 14px; font-size: 0.95rem; }
}

/* === Row hover-reveal actions === */
.row-actions {
    display: flex; gap: 4px; align-items: center;
    opacity: 0; transition: opacity .15s;
}
tr:hover .row-actions { opacity: 1; }
@media (hover: none), (max-width: 768px) { .row-actions { opacity: 1; } }

/* === Empty state === */
.empty-state {
    padding: 60px 24px; text-align: center;
    background: var(--card-bg);
    border-radius: var(--radius); border: 2px dashed var(--border);
    margin-bottom: 20px;
}
.empty-state-icon { font-size: 3.2rem; margin-bottom: 14px; display: block; line-height: 1; }
.empty-state h3 { color: var(--text-secondary); font-weight: 600; margin-bottom: 6px; font-size: 1.1rem; }
.empty-state p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 20px; }

/* === Improved task nav (solve) === */
.task-nav a {
    width: 36px !important; height: 36px !important;
    border-radius: 8px !important;
    background: rgba(255,255,255,.1) !important;
    border: 1.5px solid rgba(255,255,255,.18) !important;
    color: #cbd5e1 !important;
    font-size: 0.78rem !important; font-weight: 600 !important;
    transition: all .15s !important;
}
.task-nav a.answered {
    background: #3b82f6 !important;
    border-color: #3b82f6 !important;
    color: #fff !important;
    box-shadow: 0 2px 6px rgba(59,130,246,.4) !important;
}
.task-nav a:hover { border-color: rgba(255,255,255,.45) !important; color: #fff !important; }

/* === Каталог заданий === */
.catalog-num-link {
    display: flex; align-items: center; justify-content: space-between;
    padding: 8px 14px; font-size: 0.85rem; color: var(--text);
    text-decoration: none; border-left: 3px solid transparent;
    transition: background .12s, border-color .12s;
}
.catalog-num-link:hover { background: var(--hover-bg); text-decoration: none; color: var(--text); }
.catalog-num-link.active { border-left-color: var(--primary); background: #eff6ff; color: var(--primary); font-weight: 600; }
.catalog-num-count {
    background: var(--bg); color: var(--text-muted); font-size: 0.72rem;
    border-radius: 20px; padding: 1px 7px; font-weight: 600; min-width: 24px; text-align: center;
}
.catalog-task-card { padding: 16px 18px; }
.catalog-task-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 10px; flex-wrap: wrap; gap: 6px;
}
.catalog-task-img { max-width: 100%; max-height: 200px; border-radius: var(--radius-sm); margin-bottom: 10px; }
.catalog-task-text { font-size: 0.875rem; color: var(--text-secondary); margin-bottom: 8px; line-height: 1.5; }
.catalog-task-answer { font-size: 0.85rem; color: var(--text-muted); }
.badge-num {
    background: var(--primary); color: #fff;
    border-radius: 20px; padding: 2px 10px; font-size: 0.75rem; font-weight: 700;
}
.badge-manual {
    background: #fef3c7; color: #92400e;
    border-radius: 20px; padding: 2px 8px; font-size: 0.72rem; font-weight: 600;
}
.source-badge {
    border-radius: 20px; padding: 2px 8px; font-size: 0.72rem; font-weight: 600;
}
.source-fipi { background: #dbeafe; color: #1e40af; }
.source-sdamgia { background: #dcfce7; color: #166534; }
.source-print_solve { background: #d1fae5; color: #065f46; }
.source-dinamika { background: #fce7f3; color: #9d174d; }
.source-manual { background: #f3f4f6; color: #374151; }

/* Панель назначения номера */
.assign-panel {
    margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border);
    display: flex; flex-wrap: wrap; gap: 4px; align-items: center;
}
.assign-btn {
    width: 32px; height: 32px; border: 1px solid var(--border); border-radius: var(--radius-sm);
    background: var(--card-bg); color: var(--text); cursor: pointer; font-size: 0.8rem;
    transition: background .12s, color .12s, border-color .12s;
}
.assign-btn:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* === Каталог — модальное окно === */
.catalog-modal-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,.5);
    z-index: 2000; display: flex; align-items: flex-start; justify-content: center;
    padding: 20px; overflow-y: auto;
}
.catalog-modal {
    background: var(--card-bg); border-radius: var(--radius-lg);
    width: 100%; max-width: 960px; display: flex; flex-direction: column;
    max-height: calc(100vh - 40px); box-shadow: 0 20px 60px rgba(0,0,0,.25);
    margin: auto;
}
.catalog-modal-head {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 20px; border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.catalog-close-btn {
    background: none; border: none; cursor: pointer; font-size: 1.2rem;
    color: var(--text-muted); padding: 4px 8px; border-radius: var(--radius-sm);
    transition: background .12s; line-height: 1;
}
.catalog-close-btn:hover { background: var(--bg); color: var(--text); }
.catalog-settings {
    padding: 14px 20px; border-bottom: 1px solid var(--border); flex-shrink: 0;
    background: var(--table-header-bg);
}
.catalog-modal-body {
    display: flex; flex: 1; min-height: 0; overflow: hidden;
}
.catalog-left {
    width: 220px; flex-shrink: 0; border-right: 1px solid var(--border);
    display: flex; flex-direction: column; overflow: hidden;
}
.catalog-search-wrap { padding: 10px; border-bottom: 1px solid var(--border); flex-shrink: 0; }
.catalog-num-list { flex: 1; overflow-y: auto; }
.catalog-num-btn {
    display: flex; align-items: center; justify-content: space-between;
    width: 100%; padding: 9px 14px; border: none; background: none; cursor: pointer;
    font-size: 0.85rem; color: var(--text); border-left: 3px solid transparent;
    transition: background .12s, border-color .12s; text-align: left;
    position: relative;
}
.catalog-num-btn:hover { background: var(--hover-bg); }
.catalog-num-btn.active { border-left-color: var(--primary); background: #eff6ff; color: var(--primary); font-weight: 600; }
.catalog-num-btn.has-task { color: var(--success); }
.catalog-num-btn.has-task.active { color: var(--success); border-left-color: var(--success); background: #f0fdf4; }
.catalog-check { color: var(--success); font-weight: 700; margin-left: 4px; }
.catalog-right { flex: 1; overflow-y: auto; padding: 0; }
.catalog-task-item {
    display: flex; align-items: flex-start; justify-content: space-between;
    padding: 14px 16px; border-bottom: 1px solid var(--table-border); gap: 12px;
    transition: background .1s;
}
.catalog-task-item:hover { background: var(--hover-bg); }
.catalog-task-item.is-added { background: #f0fdf4; }
.catalog-task-item-body { display: flex; gap: 12px; align-items: flex-start; flex: 1; min-width: 0; }
.catalog-task-thumb { width: 80px; height: 60px; object-fit: cover; border-radius: var(--radius-sm); flex-shrink: 0; }
.catalog-task-item-text { flex: 1; min-width: 0; }
.catalog-task-item-meta { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; margin-top: 6px; }
.catalog-placeholder {
    padding: 60px 20px; text-align: center; color: var(--text-muted); font-size: 0.9rem;
}
.catalog-modal-foot {
    padding: 14px 20px; border-top: 1px solid var(--border); flex-shrink: 0;
    display: flex; align-items: center; gap: 12px; justify-content: space-between;
    flex-wrap: wrap;
}
.catalog-progress { font-size: 0.875rem; color: var(--text-secondary); }
.btn-success {
    background: var(--success); color: #fff; border-color: var(--success);
}
.btn-success:hover { background: #059669; border-color: #059669; }

/* Прогресс-бар для статуса импорта */
.progress-bar-wrap { height: 8px; background: var(--border); border-radius: 20px; overflow: hidden; }
.progress-bar { height: 100%; background: var(--primary); border-radius: 20px; }
@keyframes progress-pulse {
    0%, 100% { width: 20%; }
    50% { width: 80%; }
}

@media (max-width: 600px) {
    .catalog-modal-overlay { padding: 0; align-items: flex-end; }
    .catalog-modal { border-radius: var(--radius-lg) var(--radius-lg) 0 0; max-height: 92vh; }
    .catalog-left { width: 160px; }
    .catalog-modal-foot { flex-direction: column; align-items: stretch; }
    .catalog-modal-foot .btn { width: 100%; justify-content: center; }
}